free · in-browser · no upload

DICOM to PDF
Converter

Drop your DICOM file. We'll convert it to PDF right here in your browser, your file never leaves your device.

or drop your file

Select your file here to get started

or drop your file here.

Accepts .dcm, .dicom

nothing uploaded no file size cap no signup

How it works

Three steps. No upload, no signup.

1
Drop your file
Click the dropzone above or drag a DICOM from your desktop. Files of any size, there's no upload, so there's no upload limit.
2
Convert in your browser
The conversion runs entirely in this tab using JavaScript and WebAssembly. Your file never touches our servers, we don't have any.
3
Download
Get your PDF the moment the conversion finishes. Convert another, or close the tab.

Files stay on your device

Your file is never uploaded. The entire conversion runs in your browser using WebAssembly. We can't see what you convert because we have no server to see it.

No file size limit

Server converters cap free users at 1-2 GB and gate larger files behind a paid plan. Since nothing uploads, our limit is whatever your browser can handle.

Free, no signup, no ads on conversions

No account required. No watermark on the output. No queue. Drop a file, get a converted file.

Why convert DICOM → PDF

What this conversion is actually for

For patient handouts, clinical reports, or archival packets you often want the DICOM as a single PDF page rather than a raw image. PDFs print correctly at any DPI, embed cleanly in EHR uploads, and email/storage systems trust them. Same in-browser HIPAA story as the other DICOM tools.

A real example

You are assembling a referral packet that needs to include the chest X-ray as a printable PDF. Drop the .dcm, get a single-page PDF, attach to the referral letter.

Troubleshooting

The image fills the page; can I add patient metadata as a header?

Not in v1, the PDF is image-only. If you need patient identifiers on the page, open the .dcm in your imaging viewer and use its built-in 'print with labels' export. A future route may add a sidecar metadata page.

Formats involved

About DICOM and PDF

DICOM, Digital Imaging and Communications in Medicine

DICOM is the universal medical imaging format — every X-ray, CT scan, MRI, ultrasound, mammogram, PET scan, and most pathology slides from every modern PACS (Picture Archiving and Communication System) is DICOM. The format wraps a pixel-data payload (the actual image) with a rich metadata header carrying patient identifiers, study/series/instance UIDs, imaging modality, acquisition parameters, window/level presets, and per-vendor private tags. Spec maintained by NEMA (National Electrical Manufacturers Association); first published in 1985 as ACR-NEMA 1.0, became DICOM 3.0 in 1993, still actively versioned today. Wire format: 128-byte preamble + `DICM` magic + tagged-value stream where each tag is a (group, element) pair indexing into the DICOM Data Dictionary.

How to open

Hospital workstations open DICOM natively. For desktop viewing: RadiAnt, OsiriX (macOS), Horos (macOS, free), MicroDicom (Windows, free), Weasis (cross-platform Java). For programmatic access: dcmtk (CLI), pydicom (Python), dcm4che (Java). The free MyChart-equivalent apps from most hospital systems also surface DICOMs from your own scans.

Full DICOM format guide →

PDF, Portable Document Format

PDF is the universal document format for fixed-layout content, invoices, contracts, scanned documents, e-books, forms. Created by Adobe in 1993 and made an open ISO standard in 2008, PDF preserves exact layout, fonts, and images across every device. Files can be searchable text, scanned images, or both. Most modern PDFs include a text layer that copy/paste and search work against.

How to open

Every modern browser opens PDFs natively. Acrobat Reader is free; macOS Preview, Windows Edge, and ChromeOS all open PDFs without extra software. For editing, Adobe Acrobat Pro or open-source PDFsam are common.

Full PDF format guide →

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FAQ

Common questions

Is this DICOM → PDF converter really free?

Yes. No signup, no watermark, no daily file count limit. Every conversion runs in your browser, your file never touches our servers because there are no servers.

Where does my file go when I convert it?

Nowhere. The conversion runs entirely in your browser using JavaScript and WebAssembly. Your file is never uploaded to our servers. We don't have any servers handling files, there's nothing for us to log, store, or accidentally leak.

What's the maximum file size?

Whatever your browser can hold in memory. Practically, this means a few hundred MB on most computers, significantly larger than the 1-2 GB caps that server-upload converters charge for. Very large files (multi-GB) may require closing other browser tabs first.

Why convert DICOM to PDF?

Medical imaging interchange — sharing scans between hospitals, second opinions, research datasets, patient downloads from EHR portals. Documents that need to look identical on every device. The most common reason to convert is compatibility, PDF works in places where DICOM doesn't, or vice versa.

How do I open a DICOM file in the first place?

Does this work offline?

Once the page is loaded, the conversion itself runs entirely offline. The first time you use a tool, your browser downloads the conversion library (a one-time cache). If you reload while offline, the page won't load, but you can install the site as a Progressive Web App for full offline use.

Can I convert multiple files at once?

Single file at a time for now. Batch conversion is on the roadmap, for now, drop one file, download the result, then convert the next.

DICOM to PDFConverter